17.10 - UNIQUE Constraint - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Data Types and Literals

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Programming Reference
Publication ID
English (United States)

A column or set of columns defined as UNIQUE must also be NOT NULL.

Vantage instantiates UNIQUE as a unique primary or secondary index. One or more columns or sets of columns can be defined as UNIQUE for a table.

For more details, see:
  • CREATE TABLE in Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144
  • Teradata Vantage™ - Database Design, B035-1094.